[Django]-Caching at QuerySet level in Django

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This is a really cool idea, but I’m not sure if you can Cache full-on Objects.. I think it’s only attributes

Now this having a point. Grom what I’m seeing from the limited code I’ve seen idk if it does have a point, unless filtering for Jane and John (and only them) is very common. Very narrow.
Maybe just try caching ALL the users or just individual Users, and only the attributes you need

Update

Yes! you are completetly correct, you can cache full on objects- how cool!

I don’t think your example method of queryset = MyModel.objects.filter(id__range=[0,99]).queryset_from_cache() would work.

but you can do something similar by using Model Managers and do something like: queryset = MyModel.objects.queryset_from_cache(filterdict)

Models

  • Natually you can return just the qs, this is just for the example to show it actually is from the cache
from django.db import models

class MyModelManager(models.Manager):
  def queryset_from_cache(self, filterdict):
    from django.core.cache import cache

    cachekey = 'MyModelCache'
    qs = cache.get(cachekey)

    if qs:
      d = {
        'in_cache': True,
        'qs': qs
        }
    else:
      qs = MyModel.objects.filter(**filterdict)
      cache.set(cachekey, qs, 300) # 5 min cache
      d = {
        'in_cache': False,
        'qs': qs
        }
    return d


class MyModel(models.Model):
  name    =   models.CharField(max_length=200)
  #
  # other attributes
  #

  objects = MyModelManager()

Example Use

from app.models import MyModel
filterdict = {'pk__range':[0,99]}
r = MyModel.objects.queryset_from_cache(filterdict)
print(r['qs'])

While it’s not exactly what you wanted, it might be close enough

👤Nealium

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